Turkey has received the first parts of a Russian S-400 missile defense system despite opposition from the US.
The Turkish Defense Ministry says the shipment arrived in an airbase in the capital Ankara on Friday.
The move will anger the US, which has warned that turkey cannot have both the S-400 anti-aircraft defense system and US F-35 fighter jets.
Turkey and the US are NATO allies – but Turkey has also been establishing closer links with Russia.
Turkey has signed up to buying 100 US F-35s, and has invested heavily in the F-35 program.
However, us defense officials have said they do not want the F-35 jets to be near S-400 systems – because they fear Russian technicians will be able to access the F-35’s vulnerabilities